| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9861445 | Physics Letters B | 2005 | 9 Pages |
Abstract
The absolute branching fraction for the decay D+âμ+ν has been directly measured based on a data sample of about 33 pbâ1 collected around s=3.773GeV with the BES-II detector at the BEPC collider. A total of 5321±149±160Dâ mesons are reconstructed in nine hadronic decay modes. In the system recoiling against these singly tagged Dâ mesons, 2.67±1.74 purely leptonic decay events of D+âμ+νμ are observed. Those yield the branching fraction of BF(D+âμ+νμ)=(0.122â0.053+0.111±0.010)%, and a corresponding value of the pseudoscalar decay constant fD+=(371â119+129±25)MeV.
Related Topics
Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
BES Collaboration BES Collaboration, M. Ablikim, J.Z. Bai, Y. Ban, J.G. Bian, X. Cai, J.F. Chang, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, Jun Chen, M.L. Chen, Y.B. Chen, S.P. Chi, Y.P. Chu, X.Z. Cui, B.S. Zou,